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enumerate.go
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enumerate.go
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package main
import (
"bufio"
"database/sql"
"flag"
"fmt"
_ "github.com/mattn/go-sqlite3"
"github.com/op/go-logging"
"net"
"os"
"os/exec"
"regexp"
)
var log = logging.MustGetLogger("enumerate")
var format = logging.MustStringFormatter(
`%{color}%{time:15:04:05.000} %{shortfunc} ▶ %{level:.4s} %{id:03x}%{color:reset} %{message}`,
)
func initRecords(db *sql.DB) {
statement := `
create table routes (id integer not null primary key, route text, asn text, owner text);
create table records (id integer not null primary key, name text, addr text, route_id integer not null, foreign key (route_id) references routes(route_id));
delete from routes;
delete from records;
`
_, err := db.Exec(statement)
if err != nil {
log.Fatal(err)
}
}
func ingest(db *sql.DB, hostListFilename string) []string {
var knownRoutes []*net.IPNet
var failed []string
_, tenNet, _ := net.ParseCIDR("10.0.0.0/8")
_, oneSevenTwoNet, _ := net.ParseCIDR("172.16.0.0/12")
_, oneNineTwoNet, _ := net.ParseCIDR("192.168.0.0/16")
rfc1918Blocks := []*net.IPNet{tenNet, oneSevenTwoNet, oneNineTwoNet}
tx, err := db.Begin()
if err != nil {
log.Fatal(err)
}
stmt, err := tx.Prepare("insert into records(id, name, addr, route_id) values(?, ?, ?, ?)")
if err != nil {
log.Fatal(err)
}
netStmt, err := tx.Prepare("insert into routes(id, route, owner, asn) values(?, ?, ?, ?)")
if err != nil {
log.Fatal(err)
}
defer stmt.Close()
fh, err := os.Open(hostListFilename)
if err != nil {
log.Fatal(err)
}
defer fh.Close()
scanner := bufio.NewScanner(fh)
i := 0
for scanner.Scan() {
name := scanner.Text()
fmt.Println("Ingesting", name)
ip := getFirstIp(name)
if ip == "" {
continue
}
foundNet := false
isPrivateNet := false
netNumber := 0
for j, subnet := range knownRoutes {
if subnet.Contains(net.ParseIP(ip)) {
foundNet = true
netNumber = j
}
}
for _, privNet := range rfc1918Blocks {
if privNet.Contains(net.ParseIP(ip)) {
log.Info("Skipping rfc1918 netblock for %v: %v", name, ip)
isPrivateNet = true
break
}
}
if foundNet != true && isPrivateNet != true {
route, asn, netName := getWhois(ip)
if route == "" {
log.Errorf("Couldn't parse data for %v, skipping", name)
failed = append(failed, name)
continue
}
_, routeNet, err := net.ParseCIDR(route)
if err != nil {
log.Fatalf("Invalid CIDR for route %s", route)
}
netNumber = len(knownRoutes)
_, err = netStmt.Exec(netNumber, route, asn, netName)
knownRoutes = append(knownRoutes, routeNet)
}
_, err = stmt.Exec(i, name, ip, netNumber)
if err != nil {
log.Fatal(err)
}
i++
}
tx.Commit()
return failed
}
func getFirstIp(name string) string {
ips, err := net.LookupIP(name)
if err == nil {
ip := ips[0].String()
log.Debugf("Got %s for %s", ip, name)
return ip
} else {
log.Infof("No record for %s: %v", name, err)
return ""
}
}
func getWhois(ip string) (string, string, string) {
var route string
var owner string
var asn string
routeRE := regexp.MustCompile(`(?m:^route6?:\s+(.+)$)`)
asnRE := regexp.MustCompile(`(?m:^origin:\s+(.+)$)`)
ownerRE := regexp.MustCompile(`(?m:^as-name:\s+(.+)$)`)
path, err := exec.LookPath("whois")
if err != nil {
log.Fatal("Must have `whois` binary in $PATH")
}
if cmdOut, err := exec.Command(path, []string{"-m", ip}...).Output(); err != nil {
log.Errorf("Could not retrieve whois report for %s", ip)
return "", "", ""
} else {
matches := routeRE.FindAllStringSubmatch(string(cmdOut), -1)
if len(matches) == 0 {
log.Debugf("Could not match route field")
route = ""
} else {
route = matches[0][1]
}
matches = asnRE.FindAllStringSubmatch(string(cmdOut), -1)
if len(matches) == 0 {
log.Debugf("Could not match asn field")
asn = ""
} else {
asn = matches[0][1]
}
if cmdOut, err = exec.Command(path, []string{"-m", asn}...).Output(); err != nil {
log.Errorf("Could not retrieve whois report for %s", ip)
owner = ""
} else {
matches = ownerRE.FindAllStringSubmatch(string(cmdOut), -1)
if len(matches) == 0 {
log.Debugf("Could not match as-name field")
owner = ""
} else {
owner = matches[0][1]
}
}
log.Infof("Got ASN:%s Route:%s Owner:%s for ip %s", asn, route, owner, ip)
return route, owner, asn
}
}
func main() {
logBackend := logging.NewLogBackend(os.Stderr, "", 0)
logBackendFormatter := logging.NewBackendFormatter(logBackend, format)
leveledLogBackend := logging.AddModuleLevel(logBackend)
leveledLogBackend.SetLevel(logging.DEBUG, "")
logging.SetBackend(leveledLogBackend, logBackendFormatter)
dbFile := flag.String("db", "./enumerate.db", "path to output database")
domainList := flag.String("list", "./enumerate.txt", "path to domain list")
flag.Parse()
os.Remove(*dbFile)
db, err := sql.Open("sqlite3", *dbFile)
if err != nil {
log.Fatal(err)
}
defer db.Close()
initRecords(db)
failed := ingest(db, *domainList)
if len(failed) != 0 {
fmt.Println("The following domains failed to enumerate correctly:")
for _, failDomain := range failed {
fmt.Println(failDomain)
}
}
os.Exit(0)
}